Expanding the Sathar Wars

I'm going by memory here, but if I recall correctly both Sathar Wars were depicted mostly as space wars. Has anyone thought about Landfleet's involvement in these wars, or has expanded the details of these wars to include information about any major battles fought planet side between the UPF and the worms. I'd love to find out if any material on this exists or if anyone has come up with ideas for what was happening on various worlds, while Sathar and UPF fleets clashed in space.